Slab Cost Estimator: Garage, Shop & Shed Floor Slabs
Price a standalone floor slab for a garage, workshop, or shed by thickness and load rating, with current 2026 Florida pricing. Estimates start at $750.
What This Slab Estimate Covers
This estimator prices STANDALONE floor slabs for garages, workshops, sheds, and other detached structures, organized by slab thickness and load rating — distinct from our foundation cost estimator, which prices whole-house foundation TYPES (slab-on-grade, stem wall, pile) for a home's structural foundation rather than an interior floor slab for a standalone or accessory structure.
A standard 4-inch residential slab (suitable for a shed or light storage use) typically runs $4-$7 per square foot. A 5-inch slab rated for a typical garage or workshop with vehicle and light equipment loads runs $5.50-$9 per square foot. A 6-inch reinforced slab rated for heavier equipment or a workshop with vehicle lifts runs $7-$12 per square foot, and an 8-inch heavy-duty slab for RV storage or heavy equipment runs $9-$16 per square foot.
Need a whole-house foundation type comparison instead? See our foundation cost estimator for slab-on-grade, stem wall, and pile foundation pricing.
Choosing the Right Slab Thickness for Your Load
Slab thickness and reinforcement should be sized to the heaviest anticipated load — a slab poured for light storage that later needs to support a vehicle lift or heavy equipment may crack or settle under a load it wasn't designed for, making it worth planning for your intended use upfront rather than upgrading later.
4" Standard Slab
Light storage/shed use, $4-$7 per SF.
5" Garage/Workshop Slab
Vehicle and light equipment loads, $5.50-$9 per SF.
6" Reinforced Slab
Heavier equipment or vehicle lifts, $7-$12 per SF.
8" Heavy-Duty Slab
RV storage or heavy equipment, $9-$16 per SF.
2026 Florida Slab Costs by Thickness
Typical 2026 Florida market rates for standalone floor slabs, by thickness and load rating.
| Slab Thickness / Rating | Typical Florida Cost (2026) |
|---|---|
| 4" standard slab (shed/light storage) | $4 – $7 / SF |
| 5" garage/workshop slab | $5.50 – $9 / SF |
| 6" reinforced slab (heavier equipment) | $7 – $12 / SF |
| 8" heavy-duty slab (RV/heavy equipment) | $9 – $16 / SF |
| Rebar/wire mesh reinforcement upgrade | $0.50 – $1.50 / SF |
| 600 SF workshop slab, 6" reinforced | $4,200 – $7,200 |
What Affects Slab Cost
Slab Thickness
4-inch, 5-inch, 6-inch, and 8-inch slabs carry proportionally different material costs.
Intended Load
Vehicle storage, workshop equipment, and heavy machinery each require different thickness and reinforcement.
Reinforcement
Rebar or wire mesh reinforcement adds cost but improves crack resistance and load capacity.
Site Preparation
Grading, compaction, and vapor barrier installation affect long-term slab performance.
Concrete Strength (PSI)
Higher-PSI concrete mixes cost more but support heavier loads.
Slab Size
Larger slabs typically achieve a modestly lower cost per square foot.
Finish Level
Basic broom finish costs less than a sealed, polished, or coated slab finish.
Region
South Florida material and labor costs typically run higher than North or Central Florida.
Slab Cost Calculator
Get a ballpark slab cost range based on thickness and square footage.
Estimated Florida market range for slab cost estimator
Get an Exact Quote →Florida Building Code, Climate & Permitting
Termite Pretreatment Requirements
Florida Building Code requires soil termite pretreatment prior to slab pour for most accessory structures.
Sandy Soil Compaction
Florida's sandy soil requires careful sub-base compaction before pouring any standalone slab to prevent future settlement.
Licensed Concrete Contractors
Verify any concrete contractor's license at myfloridalicense.com before signing a contract.
Florida Building Code Accessory Structures
See the Florida Building Commission for permitting requirements on accessory structure slabs.
How We Deliver Your Estimate
Share Your Slab Plans
Tell us your intended use, dimensions, and anticipated load (vehicles, equipment, storage).
Thickness & Reinforcement Review
We recommend an appropriate thickness and reinforcement level for your load.
Detailed Cost Breakdown
We price material, prep, and pour at current Florida rates.
Delivery & Support
You receive your estimate within 24–48 hours.
Frequently Asked Questions
A typical garage or workshop slab uses 5-inch thickness rated for vehicle and light equipment loads; heavier equipment may warrant 6 inches or more.
Rebar or wire mesh reinforcement is optional for light-storage slabs but recommended for anything supporting vehicles or heavier loads.
Yes, a garage or shop slab is typically a standalone interior floor slab, while a house foundation supports the entire structural load of a home.
Estimates through Estimate Florida Consulting start at $750, scaling with slab size and thickness.
Yes, see our foundation cost estimator for slab-on-grade, stem wall, and pile foundation pricing.
Yes, see our gravel driveway cost estimator or paving cost estimator.
Request Your Estimate
Upload your plans and get a detailed, line-item slab cost estimator estimate in 24–48 hours. Estimates start at $750, based on project size and scope.
Pricing
Estimates start at $750 and scale with project size and scope complexity.
Turnaround
Most slab cost estimator estimates are delivered within 24–48 hours of receiving your plans.
What to Include
Plans, spec sheets, or scope description. No plans yet? We can still ballpark from a description.
What You Receive
A detailed, CSI MasterFormat line-item breakdown ready for bidding or budgeting.
Email Us
Ready for an Accurate Slab Cost Estimator?
Serving all 67 Florida counties — 24–48 hour turnaround — estimates start at $750.
Request Your Estimate